Washington's top nuclear envoy extended his stay in North Korea and held more talks Thursday in a bid to break an impasse over the communist country's nuclear program, officials said. U.S. diplomat Christopher Hill went to North Korea on Wednesday to meet with his North Korean counterpart, Kim Kye Gwan, at the reclusive nation's invitation, U.S. officials said. He stayed the night, and the two sides were holding more talks Thursday, officials were quoted as saying by the Associated Press.
